77856922 has 16 divisors (see below), whose sum is σ = 137202912. Its totient is φ = 32667120.

The previous prime is 77856901. The next prime is 77856929. The reversal of 77856922 is 22965877.

It is not an unprimeable number, because it can be changed into a prime (77856929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135828 + ... + 136399.

It is an arithmetic number, because the mean of its divisors is an integer number (8575182).

Almost surely, 2^77856922 is an apocalyptic number.

77856922 is a deficient number, since it is larger than the sum of its proper divisors (59345990).

77856922 is a wasteful number, since it uses less digits than its factorization.

77856922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272253.

The product of its digits is 423360, while the sum is 46.

The square root of 77856922 is about 8823.6569516273. The cubic root of 77856922 is about 427.0044589260.

The spelling of 77856922 in words is "seventy-seven million, eight hundred fifty-six thousand, nine hundred twenty-two".